Pfaff 441-O - Bobbin Case Openers

12
12.1
Correct
setting:
12.0.1
12.1.1
12.1.2
12.1.3
12.1.4
12.1.5
12.1.6
Bobbin case openers
Right bobbin case opener eccentric
When thetake-upleverisat bottom deadcenter,shaft3ofthe right bobbin caseopener
should be exactly atitsrear point ofreversal, asseen inthe direction offeed(see arrow).
a
Screw on the feed dog.
Also screwontheneedle plate, making surethatthelugsof both bobbin case bases enter
the
appropriate slotsonthe underside ofthe needle plate.
Loosen screw 1 in the right bobbin case opener eccentric, which was tightened previously.
Turnthe balancewheelto bring the take-up leverto bottom dead center.
Turn the right bobbin case openereccentric 2onitsshaft until shaft3is exactly at
its rear pointof reversal (see arrow).
Inthis position, tighten screws1 securely.
16
From the library of: Superior Sewing Machine & Supply LLC